Instantiating a BizTalk map in PowerShell to verify deployment and view the XSLT
Simple caching for cross-reference lookups in maps, with an expiring cache
Using the cloud for a service bus based on Command-Query Separation. Part 3 - pros and cons
Configuring BizTalk schemas and maps to work with .NET DataSets
How to use BizTalkCop in Visual Studio for BizTalk 2009 projects
With Microsoft's new MMC snap-in for SSO, the SSO Config Tool on CodePlex has been superseded.
A sample BizTalk deployment script using PowerShell to modify config files, create registry keys and update the SSO config store.
Automated BizTalk deployments using PowerShell
Initial look at BTS 2009 with some notes on VirtualBox